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Gold Dredge, Klondike River, Canada, 1915 The Yankee Fork dredge near Bonanza City, Idaho, which operated into the 1950s. A gold dredge is a placer mining machine that extracts gold from sand, gravel, and dirt using water and mechanical methods. The original gold dredges were large, multi-story machines built in the first half of the 1900s.
Dredge No. 4 (Hän: Lëzrą Kä̀nëchà "s/he is looking for money") is a wooden-hulled bucketline sluice dredge that mined placer gold on the Yukon River from 1913 until 1959. It is now located along Bonanza Creek Road 13 kilometres (8.1 mi) south of the Klondike Highway [ 1 ] near Dawson City , Yukon , where it is preserved as one of the ...
In June 1911, at a cost of $100,000, [8] the Castle Creek Hydraulic Gold Mining Company established the first gold dredge—also the first electric placer mining dredge—in the Black Hills about 1.5 miles (2.4 km) upstream of Mystic. [9]
Three dredges worked the valley from 1913 to 1954. Sumpter No. 3 was built substantially from parts of the first dredge, which had been idle for 10 years. Between them, the dredges traveled more than 8 miles (13 km), [4] extracting $10 to 12 million worth of gold. Still, it cost more to run than the gold could pay for.
The Goldstream Dredge No. 8 cut a 4.5-mile (7.2 km) track and produced 7.5 million ounces of gold. [2] The dredge was named a Historic Mechanical Engineering Landmark by the American Society of Mechanical Engineers in 1986. [2] In 1984, it was listed as a historic district on the National Register of Historic Places. [1] Today, it is open to ...
Dredges were used in the Klondike River valley from 1910-1950. [8] A dredge could do the work of 2,400 [9] persons while operated by 10-12. [10] It would create a pool of water that moved along with it as it dug up gravel in front and deposited it behind itself. Inside sand and gold particles were separated from rocks and then gold from sand.
The dredge, immediately labelled the Sew Hoy dredge, was the first in the world capable of working flats and riverbanks. Its success in the dredging of the Big Beach river flats initiated a major gold-seeking breakthrough. [ 43 ]
South Platte Dredging Co., Dredge No. 1 or the Fairplay Dredge. This bucketline gold dredge operated from 1941 until 1951. Capable of excavating 15,000 cubic yards of gravel per day, it produced 9,000 ounces of gold in its first year of operation, and a total of 120,000 ounces before dismantlement. [2]: 110, 112
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